kasandrich
27-07-2006, 10:58 AM
When these small 2 strokes sieze, what are typical symptoms?
My Son has a Motor Hispania Furia 50, (Motor minareli AM6 engine, basically the same as Aprilia RS50, Derbi Senda, Derbi GPR50, and most other geared 50's)
We had some carburation problems (would not rev cleanly and freely, so it started easily but was unridable) which could not be identified, the manufacturers wanted £300 nearly for a new carb, so we went for an aftermarket carb which was actually designed for bikes with 70cc conversion kits fitted, but jetted down for a 50. During the trouble shooting by the dealer, he suspected a top end problem, so stripped it, fitted a new piston, said there was a slight scuff on the bore, but it was OK.
Ran nicely after that but it fell off the stand and broke the clutch lever handle bar mount, which took nearly 6 weeks to get hold of. So he is back on the road.
Then 24 hours later, he got about 5 miles out of town, and he said the engine stopped, the backwheel locked, then free'd up then locked, and repeated until he came to a standstill, is this lock fre up, lock cycle typical of a small 2 stroke sieze?? his mate who was behind him said that the first time it happenedd it dropped a load of what he thought was water from under the engine. It has water in the rad OK and oil in the oil tank OK.
He got it started again after a while, rode less than half a mile and the same thing happened again.
Got it recovered home by RAC, now we have had it running, the plug was black and crappy, new one fitted. Had to tweak the carb to make it tickover, no idea why, and I think/hope it was the tickover screw???? He took it out for a test ride and came back reporting it was fine!......but I spotted oil sprayed on his back tyre, no trace of the source.
Any help muchly appreciated.
We have cleaned up the sprocket area, which is the only place we can see oil could come from, he has run it in the garden no problem, I guess he needs to take it out on the road again.
Any little 2 stroke experts out there?
My Son has a Motor Hispania Furia 50, (Motor minareli AM6 engine, basically the same as Aprilia RS50, Derbi Senda, Derbi GPR50, and most other geared 50's)
We had some carburation problems (would not rev cleanly and freely, so it started easily but was unridable) which could not be identified, the manufacturers wanted £300 nearly for a new carb, so we went for an aftermarket carb which was actually designed for bikes with 70cc conversion kits fitted, but jetted down for a 50. During the trouble shooting by the dealer, he suspected a top end problem, so stripped it, fitted a new piston, said there was a slight scuff on the bore, but it was OK.
Ran nicely after that but it fell off the stand and broke the clutch lever handle bar mount, which took nearly 6 weeks to get hold of. So he is back on the road.
Then 24 hours later, he got about 5 miles out of town, and he said the engine stopped, the backwheel locked, then free'd up then locked, and repeated until he came to a standstill, is this lock fre up, lock cycle typical of a small 2 stroke sieze?? his mate who was behind him said that the first time it happenedd it dropped a load of what he thought was water from under the engine. It has water in the rad OK and oil in the oil tank OK.
He got it started again after a while, rode less than half a mile and the same thing happened again.
Got it recovered home by RAC, now we have had it running, the plug was black and crappy, new one fitted. Had to tweak the carb to make it tickover, no idea why, and I think/hope it was the tickover screw???? He took it out for a test ride and came back reporting it was fine!......but I spotted oil sprayed on his back tyre, no trace of the source.
Any help muchly appreciated.
We have cleaned up the sprocket area, which is the only place we can see oil could come from, he has run it in the garden no problem, I guess he needs to take it out on the road again.
Any little 2 stroke experts out there?